Combined air and oil valve for internal-combustion engines.



C. W. JACKSON. COMBINED AIR AND OIL VALVE PoR INTERNAL coMBUsTIoNENGINES. APPLICATION FILED IBB.27, 1913-b 1,068,056. Patented July 22,1913.

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@wi/[Maanen C. W. JACKSON. GOMBINBD AIR AND 0IL VALVE FOR INTERNALcoMBUsTIoN ENGINES.

APPLIoATIoN FILED Imm?, 1913.

Patented Jul)T 22, 1913.

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COLUMNA ILANOGRAPM C0., WASHINGTON, D. c.

UNITED STATES PATENT OFFICE.

CLARENCE WI-IITTINGTON JACKSON, OF DUNKIRK, MONTANA, ASSIGNOR OF ONEHALF T0 NELS l. HANSON, 0E DUNKIRK, MONTANA.

wCOMBINED AIR AND OIL VALVE FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented July 22, 1913.

Application filed February 27, 1913. Serial No. 751,034.

To all whom t may concern:

Be it known that I, CLARENCE WV. JACK- soN, a citizen of the UnitedStates, residing at Dunkirk, State of Montana, have invented certain newand useful Improvements in Combined Air and Cil Valves for Internal-Combustion Engines, of which the following is a specilication.

This invention relates to a combined air and oil valve for internalcombustion engines.

In internal combustion engines having crank case lubrication,particularly those of the four-cycle type, the oil in the crank case isthrown about and tends to escape in the form of an oil-mist, there beingair pressure in the crank ease on account of the operation of theengine. To relieve this air pressure means should be provided for itsescape from the crank case, but with the air there also escapes thelubricating oil.

The present invention has for its object the provision of a. combinedair and oil valve which can be applied to the crank case of either a twoor four-cycle internal combustion engine, whether of the horizontal orvertical type, whereby the air pressure in the crank case will berelieved, air supplied to the crank case, and the lubricating, more orless atoniized oil, escaping with the coinpressed air, will beautomatically returned to the crank case on a succeeding suction orintake of air, thereby affording means for saving the oil and using itover and over again wit-hout danger of its discharge from the engine andat the same time affording means for the intake and exhaust or relief ofair.

The embodiment of the invention set forth hereinafter and shown in theaccompanying drawings is a preferred form, but is to be deemed asillustrative, rather than restrictive, of the scope of the invention.

In the accompanying drawings: Figure l is a longitudinal section througha horizontal internal combustion engine, with my invention appliedthereto, which is shown in section; Fig. 2, a view showing the inventionapplied to a vertical engine; Fig. 3, an enlarged detail longitudinalsection of the invention; Fig. Ll, a plan view thereof; Fig. 5, ahorizontal section; and Fig. 6, a detail of the spring-actuated valve.

In Fig. l there is shown a horizontal engine and in Fie'. 2, a verticalengine. Each engine shown has a crank case 1 crank 2, piston andcylinder Ll, the lubricating oil in the crank case appearing at 5.

In those types of horizontal engines which have a flat top, theinvention may be applied to such flat top as shown in Fig. l, but if theengine has no such top, the invention may take the form shown in .lli-g.2, which adapts it for application to any horizontal or vertical engine.In that form, in addition to the valve construction and case hereinafterdescribed, there is a pipe section G adapted to be attached to lthecrank case and leading to a boar or chest 7 to which the base S of thevalve is connected in any suitable manner by fastenings 9.

lWhere the engine has a, flat top to its crank case, as shown in Fig. l,atV l0, the base 8 is directly fastened thereto by fastenings or bolts1l. Preferably, cast or formed integral with the base, is a casing 12which has a central partition 13 dividing` it into chambers orcompartments lll and l5. The top of the casing is curved at 1G andextends down at 17 in rentrant manner into the casing to a point belowthe `upper end of the partition 13, the latter having a flange 18. Theremaining Awall 19 of the casing l2 is open to the atmosphere at 2O andis preferably fornied on a compound curve so as to more readily admitthe air to be drawn into the crank case and to void the air therefrom.

The base 8 is provided with valve seats 2l and 22 and there are providedan air and oil outlet valve 23 and an air and oil inlet valve 2l. Thevalves are of substantially the same form, but open in oppositedirections, the valve Q3 opening outwardly and the valve 2l openinginwardly in relation to the crank shaft. Valve 23 may be spring close-d,but is preferably simply pivoted at 25 and closes by gravity, beingprevented from assuming an exact vertical position by stops QG. Valve 2ais preferably spring closed, a convenient adjustable spring means forthis purpose being shown at 27, the tension of the spring beingregulated by the pivot 28 and the set screw Q9.

The present invention admits and voids air to and from the crank case asthe piston moves forward and returns without any resultant loss of thelubricant 5. lllhen the piston goes forward, the oil is forced past thevalve 23 and when the piston returns,

the valve 28 closes and air is sucked down through 2O and 19 and pastvalve :24C into the cra-nk case, drawing with it th'ge oil which haspreviously1 been forced past valve Q3. The curved form of the casing orshell top 16 causes the oil to be thrown down on thevalve 24; so thatwhen that. valve is opened downwardly 0r inwardly by the suction of thepiston 3, the air and the oil deposited on the valve pass into the crankcase.

Having` thus described my inventioinwhat I claim as new and desire tosecure by Let-l ters Patent, is:-

l. The combination with the crank case of an internal combustion engine,of a combined air and oil valve therefor adapted to relieve the airpressure in the crank case and to admit thereto the ydischargedlubricantand air.

2. The combination with a crank case of an ii'iternal combustion engine,of a shell or casing having communicating compartments and an airopening, an admission valve adaptedl to admit air and Vlubricant fromone compartment of the casing to the crank case, and an outlet valveadapted to admit air and lubricant discharged from the crank case, thecompartments of the casing being arranged and adapted for the passage ofthe lubricant from one to the other so that itmay reenter the crank casewithout interfering with the escape of the air discharged from the crankcase.

3. A combined air and oil valve embodying a casing having a partitionsubdividing said casing into communicating chambers or compartments,means for admittingair to one of said compartments, and admission anddischarge valves for the respective compartments.

4. A combined air and oil valve embodying a casing having an a-iradmission mouth,

vsaid. casing having a wall renteringsaid mouth, a partition in thecasing which terminates short of the rent-rant part aforesaid, therebyleaving an opening by which the compartments of the casing are placed 1ncommunication, a discharge valve for the.

compartment which is in communication withthe mouth aforesaid, and anadmission valve for the other compartment.

In testimony whereof, I hereunto aiiiX my signature in presence of twowitnesses.

CLARENCE WHITTINGTON JACKSON. litnesses NnLs P. IIANsoN, HANS E.'IIANSON Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patenti. Washington, ID. C.

